var student={
	score:{
		english:10,
		chinese:99,
		math:6
	},
	get totalScore(){
		return Object.values(this.score).reduce((x,y)=>x+y);
	},
	set english(value){
		this.score.english=value;
	},
	set chinese(value){
		this.score.chinese=value;
	},
	set math(value){
		this.score.math=value;
	}
}
